Power lift



April 2, 1940.

T. BROWN POWER LIFT Filed Dec. 18, 1936 2 sheets-sheeti- N. U-T E :n j@ Ljfmw m v T. V Nmvwm a E m N T M M ww [E A f l .w3 H- MQL ...M -,2 lf vm m.w\ A m 1.. ,m QH.

:B -56 zu J z A T lo's April 2, 1940. 1: BRowN 2,195,610

POWER LIFT Filed Deo. 18,- 1936 2 Sheets-Sheet 2 A T T ORNE YS Patented Apr. 2, 1940 UNITED STATES 4PATENT oI-Flcs & Company, Moline, nois Ill., a corporation .of Ilii- Application December 18, 1936, Serial No. 116,527

32 Claims.

The present invention relates to improvements in power lifts for tractors of the type adapted to derive power from thetractor motor and to utilize the same for operating the raising .and

5 lowering means of associated implements under the control of the operator on the tractor.

As is well known, soil erosion-has become a serious problem for farmers in various sections of this and other countries, and in order to pre- 10 vent excessive erosion ofthe soil in certain hilly farming districts it is customary to till the soil and plant in rows which follow the contour of the ground,` rather than in rows extending in a direction perpendicular to an intersecting road or l5 fence. In many instances, when working the soil and planting in contour following rows such rows terminate at an acute angle to the road or fence, and the 'rows thus formed are known as pointed rows. In cultivating these pointed rows with a cultivator which operates on several rows at the same time, which cultivators are now in verl7 common use, it is evident that when the cultivator reaches the road or fence, the several rows upon which it is operating do not terminate on a line gg perpendicular to the line of advance of the tractor, and, therefore, when thel tractor reaches the shortest row, the cultivator rig in that row should be raised independently of the other rigs, and such other rigs should be later raised in an turn as the ends of their respective rows are reached. In some instances where this type of tilling and planting is followed the distance between the terminals of adjacent rows is as great as three hundred feet. Also, under such condi- "35 tions, when starting to cultivate a number of pointed rows, the -rigs 4should be lowered one at a time, as will be apparent. In many cases also, hilly land is oftn terraced to further control the erosion of the soil. Such terraces ordinarily consist of ridges spaced thirty or forty feet apart, although in some cases, depending on the slope of the ground, they are even more widely spaced apart. These terraces or ridges also follow generally the contour of the ground, and the entire field, including the ridges, is tilled in contour following rows. Under such conditions it sometimes happens that, when cultivating a number of 'rows simultaneously along the top of a terrace, some of the cultivator rigs will run in rows on top of the ridge while others will run in rows on the side or near the bottomof the ridge, and this necessarily requires that the rigszbe set at different 'depth adjustments relau tive to -the tractor inorder to properly cultivate (Clim-50) the soil between all of the rows being operated upon.

Heretofore, under the above mentioned conditions, it has been necessary not only to adjust the vdepths of the rigs manually but also to lift 5 and lower the rigs manually by means of individual levers for the several rigs. This, of course, is disadvantageous particularly when it is neces- 'sary also to use the same implement in situations where the rows in the eld are not pointed but 10 run perpendicular to a road or fence, as in such cases it is desirable that the rigs b e raised and lowered simultaneously by power.

. With the above in view, it is the principal object of the present invention to provide a tractor Il implement of this type with improved means for transmitting power to a series of individual power lift clutches whereby the cultivator rigs or other ground working tools may be separately raised Iand lowered, or whereby said individual power 20 llift clutches may be simultaneously operated to 'raise and lower all of the rigs at the same time.

It is another object of the present invention -to provide improved means for adjusting the depth of operation of the several cultivator rigs g5 independently of each other, this being accomplished by swinging the clutch housings about their pivotal support on the drive shaft by which thel several clutches are driven.

' Other objects and advantageous features of the 30 presentvinvention will be apparent from the following description of the preferred embodiment of my invention taken in connection with the accompanying drawings, in which- Figure 1 isa top plan view of a tractor cul- 35 tivator equipped with my improved power lift and depth adjusting mechanisms;

Figure 2 is a side elevational view of the implernentshcwn in Figure l; v

Figure 3 is an enlarged cross-sectional view o throughl one of the power lift clutches, being taken substantially on the line 3 3 of Figure 2;

Figure 4 is a sectional view taken substantially on the line, 4-4 of Figure 3 and illustrating the gear means for driving one of the clutches from the common driving shaft; and r Figure 5 is anenlarged side elevational view of the clutch shown in Figures 3 and 4 and illustrating the clutch throwout mechanism.

Referring to the drawings, the tractor which is 50 of a well known commercial type is indicated as an entirety by the reference letter-T, and in the 'illustrated construction it has cultivator rigsf supported thereon for cultivating two rows, although it is to be understood that the principles of the It present invention can be applied toa tractor equipped with mechanism for cultivating any number of rows.

As best-shown in Figure 1, the cultivator comprises the usual laterally extending tool support-- ing beams I 0 and II disposed respectively at opposite sides of the tractor. 'I'he inner end of each of the 'supporting beams I0 and II is xedly secured in any suitable manner to a plate I2 that is fixedly connected to the side of the tractor by bolts. I3 as shown in Figure 2, or in any other suitable manner. -Fixedlyvmounted on each of the laterally extending beams I0 and I I is a pair of laterally spaced rig supporting brackets I4, each bracket comprising -a hub portion I5 embracing the supporting beam, an upwardly and rearwardly extending arm or member I5, and a downwardly extending arm or member I1 (Figure 2), said arms being formed integral with said hub portion. Each bracket I4 carries a conventional cultivator rig indicated as -an entirety 'by I8 andsupported by means of a pair of upper and lower parallel links 2| and 22. As shown in Figure 2, the upper link 2| is pivotally connected at its forward end by a pivot pin 23 to the upper bracket arm I6, substantially midway of the length of said arm, and is pivotally connected at its rear end as shown at 24 to an upwardly extending frame member 25 of the associated cultivator rig I8. The lower link 22 is pivotally connected at its forward or upper end to the lower end of the downwardly extending bracket arm I'Iby a bolt 25, and at its rear or lower end it is pivotally connected as shown at 2'I to the rig frame member 25.

The rig frame I8 also includes a supporting member or bar 28 that is secured in any suitable manner to the frame member 25 and extends rearwardly therefrom. The supporting member 28 carries a plurality of earth working shovels 29. As the supporting frame member 28 is disposed at an acute angle to the line of advance, as shown in Figure 1, the shovels 25 are offset from each other so that each works in its own track, and each of the rigs is adapted to cultivate one half of-the space between two adjacent rows of crops in the conventional manner'. By means of the parallel link connection between each of the rig supporting brackets I4 and its associated cultivator frame member 25, each rig is maintained parallel to the frame of the tractor T in all positions of vertical adjustment which will be hereinafter described, and as there are no connections between the several individual cultivator rigs, each rigv I8 is free to swing vertically about its points of pivotal attachment 23 and 25 to its respective supporting bracket I4.

y A hub- 30 is formed at the upper end of the arm I5 of each of the rig supporting brackets I4. These several hubs 38 are disposed 'in transverse alinement and carry a rotatable power shaft 3| that extends parallel to the main rig supporting beams I0 and I| as shown in Figure 1. 'I'he power shaft 3| is driven by a worm gear mechanism indicated as an entirety by the numeral 32 (Figures 1 and 2) which in turn is driven from the fan shaft 33 of the tractor. The worm gear mechanism 32 comprises a worm on the fan shaft 33 that meshes with a worm gear onthe transverseshaft 3|, said worm and worm gear being 'shaft 3| is continuously driven from the fan shaft of the tractor whenever the tractor motor is running. f

In order to provide for detachment of the power shaft 3| when the cultivator attachment is removed and the tractor is to be used for other purposes, said shaft is made in two sections, the inner end of each of the sections being coupled to the adjacent outer end of the worm gear shaft by means of a coupling 31 (Figure 1), said couplings being readily detachable. In the present construction'the worm gear is made a permanent element of the tractor mechanism and merely idles when the power shaft 3| is disconnected and the tractor is used for other purposes. The fan of the tractor is indicated by 38 and is secured lto the forward end of the fan shaft 33 as usual.

Each of the cultivator rigs I3 is provided with an. individual power lift mechanism of the vwell known self-interrupting half revolution clutch type and indicated as an entirety by the reference numeral 42. As the several power lift mechanisms illustrated in the accompanying drawings are identical in construction a description of one of ythem will sufllce. As shown in Figures 3, 4 and 5, each of the power lift mechanisms includes a main supporting housing 43 having a projecting housing portion 44 formed integral therewith. The projecting housing portion 44 has a hub 45 formed therein (Figure 3) which embraces the power shaft 3|. 'I'he shaft 3| is journaled in the hubs 45 of the housing projections of the several clutch mechanisms 42, 'and said shaft therefore serves as a pivotal support for the several housings, the purpose of which will hereinafter appear.

Disposed within each housing projection 44 is a pinion 45 which is rigidly secured to the shaft 3| by a pin 41 that extends through alined openings in the hub 45 of the pinion 45 and in the shaft 3|' (Figure 3). Meshing with the pinion 45 is a gear 5| that is provided with an integral elongated hub 52 journaled on an axle 53 within the main housing 43. This axle 53 has a cantilever support in a hub 54 formed in one side of the main housing 43 and is secured lrigidly t0 said hub by a pin l55. Fixed to the other end of the axle 53 is a retaining member 55 which holds the hub 52 of the gear 5| from axial movement on the axle 53.

It will be seen from the above that the gear 5| is continuously rotated by the power shaft 3| through the pinion 45. This gear 5I forms the continuously rotating driving element of the clutch mechanism, and is provided within a recess 58 formed therein with pawl engageable notches 53. These notches 55 are adapted to be engaged by a. clutch roller 5l journaled on one end of a pin 5I carried at the lower end of a pawl arm 52 (Figure4) which in turn is pivoted substantially midway of its length on a pin 53 on the intermittently rotated or driven element 54 of the clutch 42. The .driven element 54 of theclutch comprises a hub 55 (Figure 3) which is journaled on the hub 52 of the gear 5|. and a radial flange 55 to which the pivot pin 53 of the pawl arm 52 above described is attached.

The clutch 42 is provided with the usual clutch throwout dog 1| which is pivotd on the pawl pivot 53 on the opposite side of the flange 55 of the intermittently driven clutch element from the pawl arm 82. The pin 8| on which the clutch roller 80 is Journaled and which has one end connected to the pawl arm 62, extends through a slot 12 in the iiange 6 (Figure 4) and has its other end connected to the throwout dog 1| (Figure 5) opposite end of the pawl arm 02 with the notches 50 in the continuously rotating driving element of the clutch mechanism as hereinafter described. Normally, however, the roller 80 is held out of engagement with the notches 59 by the throwout dog 1| which is held in position by a roller (Figure 5) journalled on a pin on a tripping lever 19. The roller 10 engages in one of two notches 0| that are spaced 180 apart (Figure 2) in the ange 68 of the intermittently 'driven clutch element 66. When the roller 18 is in this position it also engages the throwout dog 1| which in turn acts through the pin 6| to hold the clutch roller 80 journaled on said pin out of engagement with the notches 59. Y

The tripping lever 19 has o'ne end nxedly connected to a pin 03 journaled on a lug 80 on the clutch housing 43, while its opposite end is connected to a tripping rod 8d. The roller 10 is yieldingly held in the notch 8| by a spring 85 having one end xedly connected to an arm 86 xed to the opposite end of the pin 03 from the tripping lever 'It and having its opposite end fastened in any suitable manner to the hub 54 of the clutch housing 48.

@en of the cultivator rigs is connected with its associated clutch byv means which will now be described. This means comprises a crank arm 9i formed integral with the hub 05 of the intermittently driven clutch element (Figures 2 and 5). The crank arm 9| is provided with a crank pin 92 at its outer or free end, to which crank pin is pivotally connected the upper end of a lifting rod 03 having its lower end connected to the cultivator rig l0 Aby means of aneye-bolt 94 which is boltedl to a bracket 95 fixed to the rig frame member b bolts 90 (Figures 1 and 2).

From the foregoing description of the several parts it will be apparent that each of the cultivator rigs i8 is raised and lowered by means of its associated clutch mechanism 42. The cultivator rig I8 illustrated in Figure 2 is shown in its lowered or operatingl position and when it is desired to lift-said rig to inoperative position this is readily accomplished by pushing the tripping rod`$4 forwardly. ,f This swings the tripping lever 1x9 upon its pivrjt 83 against the action of the spring 05 andrnoves the roller 18 out of the notch 8| and l"-lso out of engagement with the throwoutdog 1 It will be remembered that the throwout dog 1| is connected with the pawl 62 through the pin Si whichextends through the slot 12 in the radial flange 80 of the driven clutch element 64, and, therefore, simultaneously with the disengagement of the throwout dog 1| from the roller 18 the' spring 14 whichis connected to the pawl 62 will exert a pull on the pawl to swing said pawl on its pivot 83 to thereby move the clutch roller on the pin 8| into engagement with one of the notches 58 on the continuously rotating gear driving element 5 of the clutch.

' When the .roller 80 is so connected. the driven element I4 of the clutch will be .rotated by the driving element 5| one-half of a revolution in a clockwise direction, as viewed in Figure 2, duringwhich time the roller 18 will ride on the cam periphery of the driven clutch element 04 until the roller 18 reaches the opposite notch 8|. The tripping lever 19 will then swing on its pivot 83 under the action of the spring and the throwout dog 1| will be moved back to its initial position by the movement of the roller 18 into the notch 8|, and the throwout dog will in turn move the pawl to disconnect the clutch roller 60 from the notch 59 in the driving clutch element 6| in which it has .been engaged, thereby disconnecting the two clutch elements.

In thel illustrated construction four cultivator rigs have been shown, and each of said rigs is raisedand lowered by a half revolution clutch mechanism having a separate tripping rod 84.V

The four .tripping rods 84 extend rearwardly to a transversely extending tripping rock shaft |0| that is rotatably supported in brackets |02 secured in any suitable manner on the tractor body. 'I'his tripping rock shaft is operated by a foot pedal |03. Each of the tripping rods 84 is slidably supported in an aperture in the upper Figure 2). A collar |05 is fixed to each of the tripping rods 84 by means of a set screw, andl Aend of an arm |04 which is iixedly connected at its lower end to the transverse shaft`|0| (see '25 properly positioned on the rods in proper relation A to the arms |04 so that said'rods will be operated by the foot pedal |03. By pushing forward on the foot pedal, the shaft |0| will be rocked in a clockwise direction, as viewed in Figure 2, carrying with it the arms |04, and as such armsare normally in engagement with thecollars |05 as above described all of the rods will be moved forwardly by the arms to trip the several clutch mechanisms simultaneously. Thus the rigs can be simultaneously raised and lowered alternately by successive manipulations of the pedal |03. At

the rear end of each of the tripping rods 84 a i handle portion i 06 is provided, and when it is desired to trip an individual clutch mechanism the operator may accomplish this by merely vgrasping the handle portion |06 of the ltripping rod 84 associated with that clutch mechanism and pushing forwardly on the same, the rod sliding through the aperture in the arm |04 in this operation. The handle portion |06 is spaced a suicient distance rearwardly of the arm |04 on the tripping rock shaft to allow for this forward movement of the rod 84. v

It will be readily apparent therefore that by providing the foregoing construction, when the tractor reaches the end of a pointed row the clutch controlling the cultlvator rig in that row can be tripped by the operator to raise that rig, and in like manner the other clutches can be tripped in turn as the ends of their respective rows are reached. It is, of course, understood that a second actuation of each of the tripping rods 84 will cause their respective clutches to lower .the rigs when sov desired. It will also be apparent that when the implement is being used in a ileld where the rows run perpendicular to a I of operation of the cultivator rigs, and this -is accomplished by swinging the clutch housings 43 about the axis ofthe power shaft 3|. For this purpose each of the clutch housings 43 is proand is directly connected to an adjusting lever ||3. Each lever ||3 is pivoted,y as at ||4, to a sector I I5 that is fixed to the tractor in any suitable manner, such as by beingA welded,` as at to-a bracket H8, the lower end ||9 of which is bent outwardly and fastened-'in position by boltsv |20 to the outer en d of the tractor axle housing. The two inner clutch housings 43 whichare nearest the tractor are each connected by a level adjusting rod ||2' (Figure 2) to the upper end'of a vertically extending'arm |24 journaled intermediate its ends on a. trunnion |25 attached to the adjacent side of the tractor frame. The lower end of each of 'the pivoted arms |24 is connected by a rod |26 to aninner adjusting lever indicated between the two inner levers H3'` and the two inner clutch housings 43 is provided in order to avoid interference between the adjusting rodsv and parts of the tractor' Each of the inneradjusting levers ||3' is pivoted as at |28 to a sector adjusting levers ||3 and H3' carry conventional latch mechanism cooperating with the associated sectors for holding the levers in anyV adjusted position. It is to be understood, however, that my invention is not limited to the specific. means for connecting the clutch housings to their adjusting levers, as any other means suitable for accom- 1 plishing the desired purpose may be equally satis- It'will be seen from the foregoing that when the cultivator is being usedalong the side of a ridge or terrace and it is necessary that the cultivator rigs be adjusted to run at different depths, the operator may readily and quickly adjust the several rigs to the proper Yoperating depth by the use of theseveral hand levers |3 and ||3'. .This depth adjustment. of the several cultivator rigs accomplished by swinging the clutch housings about the axis of the power shaft 3|, of course,

does not interfere with the operationof the' clutch mechanisms within the housings 'for raising and lowering the rigs, as the positions of the willbe readily appreciated.

."While I have shown and described Amy inven'- ping rods.

tionas appliedto a tractor cultivator, it is to 4be understood, of course, -that the invention may be used in connection with other tractor implements '-or in any other situation where it may be appli- '.cable.

Iclaim: y

' 1. A"tractor propelled .agricultural machine comprising, in combination, a plurality of shiftable units, a separate power lift mechanism for shifting each of said units, a constantly rotating As shown in Figure l, each of the from said fan shaft, separate means for actuatingeach of said ,power-lift mechanisms, and by the numeral ||'3'. This linkage arrangement combination,v ashiftable u nit, a power liftA clutch supported by said housing, and means for swingeach of said mechanisms. andmeans for simultaneously operating-all of said separate'means means for simultaneously operating the latter for I actuating said power lift mechanisms in unison,

said one wayconnection. providing for individual I A actuation of said power lift mechanism bythe selected separate means.

2'. A tractor cultivator comprising-in combi-- nation, a plurality of cultivator rigs disposed at each side of the cultivator, a separate power lift mechanism for raisingA and lowering each'of said rigs, a constantly rotating power shaft for transmitting `power to all=of said power lift mechanisms, gear means connecting said shaft with each power lift mechanism. 'separate manually actuated means for controlling each of said power lift mechanisms, and mechanical'means interconnected with said separate control means for simultaneously operating the latter .to actuate said power lift mechanisms-in unison.

3. The combination with a tractorfhaving a constantly rotating fan shaft and a plurality of cultivator rigs, of `a' separate power lift mecha mism-for raising and. lowering each of said rigsfa constantly rotating power shaft for transmitting power .to said power lift mechanisms and driven means for simultaneously operating said separate means for actuating said power lift mechanisms Y .in unison.

24.- An agricultural machine -comprising, in

mechanism connected'with said unit for shifting the latter,- a drive shaft supported eccentrically'" I of saidclutch mechanism, fmeans connecting said .shaft with said clutch mechanism for driving the anism about said' drive shaft as an. for adanism connected withsa'id .rig -for' raising and lowering said rig, va power-shaft for said power lift mechanism, 'a housingen'closing said power lift' mechanism and journaled on said power shaft, the driving member of said lclutch being ingn said housing about the axisof said shaft for raising and lowerngsaid rig to adjust the depth thereof. Y f

6. A tractor cultivator comprising, in combination, v`a plurality of .cultivator rigs, a separate power lift mechanism for raising and lowering each of said rigs, al power shaft, means for driving each power lift mechanism from said power shaft, means for actuating all of said mechanisms in unison comprisingl a tripping rod connected with each vof saidmechanisms, a tripping rock shaft, means for actuating said tripping-rods in unison from said tripping rock shaft, and means for separately actuating each of 'said trip- 7. 4A' tractorcultivator comprising', -in combination,- a plurality of cultivator rigs, a separatepower liftclui'chmechanism for raisingand lowering each of saidl rigs, a constantly rotating mechanisms, said on said power shaft, separate means including a transversely disposed rock shaft for actuating for actuating'jsaid'clutchfmechanisms in unison. y 8. A tractor' cultivator comprising; in combination, a plurality of cultivator. rigs, 'a` separate power lift clutch mechanism for raisingand lowu u. power shaftfor transmitting power'to allof said v mechanisms being iournaled.

ering each of said rigs, a constantly rotating power shaft for'transmitting power to all of said clutch mechanisms, said clutch mechanisms betion, a plurality ofv cultivator rigs disposedI atA each side of the-cultivator, aseparate power lift.-

mechanism for raising and lowering each of said' rigs, a constantly rotating power shaft for transmitting power to all of said mechanisms-separate means extendin'gto. a point adjacent the operators station on the tractor for manually controlling each of said mechanisms, means ex-v tending to opposite sides of the cultivator and interconnected with said separate means for simultaneously' operating the latter to actuate said mechanisms in unison, and separate depth adjusting means Ifor eachof said rigs comprising a housing enclosing each of said clutch mechanisms and journaled on said power shaft, means connecting each of said-housings with its associated rig, and separate means for swinging each of said housings about -said power shaft as an 10. A tractor-cultivator comprising, in -combination, a'longitudinally extending frame', a beam extending laterally from each side of said frame, a plurality of cultivator rigs carried by each of said beams laterally outwardly of said longitudinally extending frame, a power shaft rotatably supported by said beams, a power-lift mechanism for each of said rigs supported on said power shaft laterally outwardly of said longitudinally extending-frame and operatively connected with the rigs for raising and lowering 'the' latter, means for driving said lift mechanisms from said'power shaft, manually operated means extending to a point adjacent the operators station on the tracb am nation, a longitudinally extending frame a e shaft havmg an am. for sndably recewmg each tor and operatively connected laterallyv outwardly of said longitudinally extending frame to separately control each`of'said lift mechanisms, mechanical means interconnected with said. separate means for simultaneously operating-,the latter to actuate said lift mechanisms in unison, and

means for separately adjusting the operating depth of each of said rigs.

1l. A tractor cultivator comprising, in combiextending laterally from each side of saidframe,

aplurallty of cultivator rigs carried by each of said beam, a power shaft supported by saidbeams, a powerlift mechanism'for each of said housing journaled on said rigs comprising la, power .shaft and means within'saidhousings for 'driving said power liftmechanisms fromsaid power shaft, means operatively connecting said power llift mechanisms with said rigs, manually operated means extending to a point adjacent the operators station on the 'tractor for separately controlling each of said power lift mechanisms, mechanical means interconnected with said separate means for simultaneously operating the latter to actuate said power lift mechanisms in unison, and separate means for swinging each f. said housings on sam shaft for adjusting the operating depth of said rigs.

12. A tractor cultivatorcomprising, in combination,- a transversely extending supporting beam, a bracket carried by said beam, a cultivator rig supported by said bracket 'for generallyl vertical movement, a power shaftjournaled in the upper end of said bracket and. adapted to be driven from thel tractor motor, a power lift unit comprising a casing swingable `about the axis of `said power shaft and supportedat least in part' onv said bracket, and, clutch mechanism within said casing operatively driven from said power shaft, means connecting saidpower lift mechanism with said-rig for'raising and-'lowering the 1atter,and means connected with said power lift casing'and adapted to swing the latter about the -axis of said power shaft for'also raising and lowering said rig.

' 13. A self-interrupting-clutch mechanism comprising a casing, a constantly rotatable part in said casing, means for driving said part, an intermittently operated part journaled' for rotation in said casing and adapted to be 4driven from said constantly rotatable part, means connected with said casing and adapted to disconnect said intermittently operated part from said constantoperated part in position relative to said casing,

-and means for shifting'. said casing about the axis v'ly rotatable part and to-hold the intermittently 14. Thecombination with -a tractor having a relatively high speed fan shaft, of a self-inter rupting clutch mechanism havinga constantly 'rotatable part, and gear reduction means for Vdriving said part from said fan shaft.

15. The combination with a tractor having a rear axle housing and a pair of cultivator rigs supported at .each side of the tractorwfor adjustment relative thereto,^of a separate adjusting mechanism for each rig; alpair of controlling levers at each side of. the tractor xed to the axle. housing with the ends.. of the inner levers e'xtending below said housing, links extending above the axle housing from the outer levers tothe Athe intermediate portion lof the tractorat ea'ch side, links extending from the lower ends of said, inner controlling levers to the lower ends ofsaid pivoted levers, and links extending from theA upper ends of .the pivoted levers to the inner adlusting mechanisms.'

of the links, a collar on each of said links, said collars being engageable by vsaid arms when the 'outersadjusting mechanisms, a lever pivoted to y vrock shaft is rocked in one direction, and a handie portion on each of said links for separately operating the latter independently of the rock shaft.v f

17. The combination with a tractor having a constantly rotating fan shaft and a plurality ofv cultivator rigs, power' lift meansfor 'raising' and lowering 'said rigs, a constantly rotating power shaft for transmitting power to said power lift means, and means for vdriving said power shaft from'said fan shaft.v 1

H18. A tractor cultivato comprising, in combination, a'plurality of cultivator rigs,A a. sepa-v ratepowerliftm'echanism for raising and lowering each of said rigs, a power shaft, means for driving each power lift mechanism from V said power shaft, means for actuating all 4of said mechanisms in unison comprisingfampart connected with each of said mechanisms, `and means having a one-way connection with eacl of said parts for operating the latter in unison,-,said one-way connections providing for actuation of each of the power lift mechanisms independently of the others.

19. An agricultural implement comprising, -in

about the axisof said power shaft for also rais-4 ing and lowering said operating unit.

20. A tractor propelled implement comprising, in combination, a plurality of movable units, a power lift mechanism for each of said movable units, links connected with each of said power lift mechanisms, a controlling rock shaft having an arm for slidably receiving each of `the links, stop means on each of said links, said stop means being engageable by said arms when the rock shaft is rocked in one direction, and means for separately operating the latter independently of the rock shaft.

21. In combination with a tractor having an engine driven shaft, a .transverse tool supporting beam carried by the tractor, a ground working ltool swingably mounted on said beam for movement between operative and transport positions,

power lift clutch mechanism supported by'said tool supporting beam and operatively connected to move said tool, a drive shaft rotatably supported by said tool supporting beam and removable therewith, said shaft being connected to drive said mechanism, and means for coupling said drive shaft to said engine driven shaft -when said tool supporting beam -is mounted on said tractor.

22.,In combination with a tractor having an engine driven shaft. an implement comprising a supporting structure adapted to be detachably mounted on and carried by said tractor, a plurality of ground working tools swingably mounted on said structure for independent movement thereon between operative and transport positions, individual power lift clutch mechanisms associated with 4each of said tools, respectively, and mounted on said structure, a common drive shaft for said clutch vmechanisms, said drive shaft being journaled on said structure and removable from the tractor therewith, and means for coupling said .drive shaft to 4said engine driven shaft when said implement structure is mounted on said tractor.

23. In combination with a tractor having an engine, an implement comprising a supporting -structure including a horizontally disposed beam extending laterally from and supported by saidl tractor, a plurality of laterally spaced ground working tools swingably mounted onwsaid beam for independent movement between operative and transport positions, an individual power lift clutch mechismisml for each of said tools and operatively connected to the latter to move the alessio same between said positions, a transversely disposed drive shaft supported on said beam and operatively connected to drive said clutch mechanisms, and means for connecting said drive shaft to said tractor engine for receiving power therefrom.

24. In combination with a tractor having an engine, a cultivator comprising a pair of tool beams carried by said tractor and extending laterally from opposite sides thereof, aplurality vof laterally spaced cultivator rigs swingably vmounted on each of said beams for independent vertical movement relative thereto, an individual power lift clutch connected to each of said rigs for independently controlling :the movement thereof and supported by said beams,v a transversely disposed drive shaft journaled on each of vertical movement between upper and lower positions, a transversely disposed drive shaft journaled on each of said beams and connected to the tractor engine to receivepower therefrom, an individual power lift clutch for each of said rigs and connected thereto for moving the latter between said positions, journal means for sup-- porting each of said clutches on one of said drive shafts, and means for swingingv said clutches about said journal means for'adjusting the depth of operation of said rigs.

26. A tractor cultivator comprising in combi-f nation, a plurality-of sets of cultivator devices, a separate power lift mechanism for raising and lowering each set of said devices, a 'power shaft, an individuallyY operable tripping element c'onnected with each of said mechanisms and movable in one direction for separately actuating its associated mechanism and shifting the associated cultivator device independently of the others,

and a movably mounted tripping member having a one way connection with each of said tripping elements for moving all of them in said one di rection and shifting all of -said cultivator devices in unison. f

. 27. 'I'he combination `with a tractor having a fan adjacent the forward end thereof and a shaft connected with said fan for driving the.

latter, of a beam extending laterally from each side of the tractor adjacent the front end thereof, transversely disposed power shaft means supported by said beams and disposed adjacent 'said fan shaft, means for driving said power shaft means from said fan shaft, tool means connected with each'of said laterallyV extending beams, and a self-interrupting 'clutch mechanism for each of said tool means, each clutch mechanism having a constantly rotatable part. and means for operatively connecting each part to said power shaft means to be driven thereby.

28'. The combination with a tractor having a fan disposed adjacent the forward end thereof and a shaft connected with said fan forl driving the latter, of a pair of tool supporting beams, one extending laterally outwardly from each side of the tractor, vertically movable tool means connected with the beam at each side of the tractor,

'l power lift mechanism at each side of the tractor :sol

and operatively connected with the tool means at that side of the tractor, constantly rotating power means for transmitting power to all of said mechanisms, and means for driving said power means from said fan shaft.

29. The combination with a tractor having a fan and a fan shaft connected therewith and disposed adjacent the forward end of the tractor, of a pair of tool beams, one connected to each side of the tractor and extending laterally outwardly therefrom at the forward end thereof adjacent the fan shaft, two supporting bracket lmeans carried. by each beam, tool means connected with said bracket means for vertical movement relative thereto, transversely disposed power shaft means supported by said brackets and extending across Vthe tractor adjacent said fan shaft, means for driving said power shaft from said fan shaft. and power lift means at each side of the tractor driving power from said power shaft and operatively connected to raise the tool means at either side of a tractor independently of the power lift means and tool means at the other side of the tractor.

30. The combination set forth in claim 29, further characterized by a link extending rearward- 1y at each side of the tractor from each of said power lift means, said link controlling the associated power lift means, and a transverse ro'ck shaft carried adjacent the rear of the tractor and having a one way connection with each of said links whereby the power lift means at both sides of the tractor may be operated simultaneously to raise or lower all of said tool means in unison.

31. The combination set forth in claim 29, further characterized by the tractor having a rear axle housing. and means supported on the latter for adjusting said power lift means to vary the depth of operation of said tool means.

32. The combination set forth in claim 29, further chracterized by said tractor having a rear axle housing, and said transverse shaft being supported by the tractor forward of said rear axle housing.

THEOPmLUS BROWN.

CERTIFICATE OF CORRECTION.

Patent-no. 2,195,610. April 2, 19Lio.

THEOPHILUS BROWN. I It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page li, second column, lines 68 and 69, claim 7, str11`out the words "including a transverselydisposed rock shaft" and insert the-same after "means" in line 70, same claim; page 5, first colmn, line )48, claim 10, for "operatoren" read -operatorls; and that the said Letters Patent should be read with this' correction therein that the same may conform to the record of the case in the Patent office. I

signe mi sealed this 11th day off June, A. D. 191m.

,l Henry' Van Arsdale (Seal) Acting Commissioner of Patents. 

